Some standard content:
Record number: 10094-2002
HG/T 2225-2001
This standard is a revision of the recommended chemical industry standard HG/T2225-1991 "Industrial Aluminum Sulfate" by adopting the Japanese Industrial Standard JISK1423:1970 (1991) "Aluminum Sulfate" in a non-equivalent manner. The main technical differences between this standard and JISK1423:1970 (1991) are: this standard divides solid products into three types, of which Type I and Type II are divided into two grades each. The main technical differences between this standard and HG/T2225-1991 are: adding liquid products and dividing solids into three types according to different uses. -The iron content index in Type I has been adjusted. The batch size of each batch of products has been increased.
This standard will replace HG/T2225-1991 from the date of implementation. This standard was proposed by the Policy and Regulations Department of the former State and Petrochemical Industry Bureau. This standard is under the jurisdiction of the Inorganic Chemical Branch of the National Technical Committee for Chemical Standardization. The responsible drafting units of this standard are: Tianjin Chemical Research and Design Institute, Henan Province Hebi City Chemical Plant No. 4, Shandong Xinhua Pharmaceutical Group Zibo Acid Manufacturing Co., Ltd., Henan Province Jiaozuo City Chemical Plant, Shanghai Minle Chemical Co., Ltd. The participating drafting units of this standard are: Yunnan Kunming Nanba Chemical Plant, Hunan Hengyang Jianheng Chemical Plant. The main drafters of this standard are: Liu Youruo, Yin Shirong, Lin Hong, Cao Jingming, Zang Jincheng, Gao Jizhong. This standard was first issued in 1964, revised for the first time in 1977, and revised for the second time in 1991. This standard is entrusted to the Inorganic Chemical Branch of the National Technical Committee for Chemical Standardization for interpretation. 372
1 Scope
Chemical Industry Standard of the People's Republic of China
Aluminum sulfate for industrial seHG/T 2225-2001
Replaces HG/T22251991
This standard specifies the requirements, test methods, inspection rules, and marking, labeling, packaging, storage and transportation of aluminum sulfate for industrial use. This standard applies to aluminum sulfate for industrial use. This product is mainly used for domestic sewage and industrial wastewater treatment, papermaking, printing and dyeing, leather, and is also used as a fire-fighting material and wood protective agent.
Molecular formula: Al2(SO)·H,O
Relative molecular mass [in Ai2(SO),]: 342.15 (according to the 1999 international relative atomic mass) 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision and parties using this standard should investigate the possibility of using the most recent versions of the following standards. GB191—1990 Pictorial marking for packaging, storage and transportation
GB/T601-1988 Preparation of standard solutions for titration analysis (volume analysis) of chemical reagents GB/T602~-1988 Preparation of standard solutions for determination of impurities in chemical reagents (neqISO6353-1:1982) GB/T603—1988 Preparation of preparations and products used in test methods for chemical reagents (neqISO6353-1:1982) GB/T 1250--- 1989
GB/T 3049—1986
Methods for expressing and determining limit values General method for determination of iron content in chemical products (1982)
GB/T 6678-19861
General rules for sampling of chemical products
GB/T 6680--1986
GB/T 6682--1992
3 Product classification
General rules for sampling of liquid chemical products
O-phenanthroline spectrophotometry (neqISO6685: Specifications and test methods for water used in analytical laboratories (eqvISO3696:1987) Industrial aluminum sulfate is divided into two categories: solid and liquid. The solid is divided into three types:
Solid type I is a general industrial product, mainly used for the treatment of industrial wastewater and domestic sewage, as well as papermaking, leather, and wood preservation. Solid type II is a low-iron product, used for post-treatment of titanium dioxide, production of high-grade paper, and production of catalyst carriers. Solid type III is a refined product with high aluminum and low iron. Requirements
4.1 Appearance
Solid industrial aluminum sulfate is white, light gray-green or light yellow flake or block solid Liquid industrial aluminum sulfate is light green or light yellow liquid. Approved by the State Economic and Trade Commission on January 24, 2002, and implemented on July 1, 2002
4.2 Industrial aluminum sulfate shall meet the requirements of Table 1. Item
First-class product
Alumina content (Al, 0.)/%
Iron (Fe) content/%
Water-insoluble matter content/%
pH value (1% aqueous solution)
Test method
HG/T2225—2001
Table 1 Requirements
Qualified product
Qualified product
The reagents and water used in this standard, unless otherwise specified, refer to analytical pure reagents and grade 3 water specified in GB/T6682. The standard titration solutions, impurity standard solutions, preparations and products used in the test, unless otherwise specified, are prepared in accordance with the provisions of GB/T601, GB/T602 and GB/T603.
Safety Tips: Some of the reagents used in the test are corrosive and must be handled with caution. If splashed on the skin, rinse immediately with plenty of water. In severe cases, seek medical treatment immediately.
5.1 Determination of Alumina Content
5.1.1 Summary of Method
The aluminum in the sample reacts with a known excess of disodium ethylenediaminetetraacetate to form a complex. At a pH of about 6, the excess disodium ethylenediaminetetraacetate is titrated with zinc standard titration solution using xylenol orange as an indicator. 5.1.2 Reagents and Materials
5.1.2.1 Hydrochloric acid solution: 1+1.
5.1.2.2 Sodium acetate solution: 189g/L.
5.1.2.3 Zinc chloride standard titration solution: c(ZnCl2) about 0.02 mol/L. 5.1.2.4 Disodium ethylenediaminetetraacetic acid (EDTA) solution: 16 g/L. 5.1.2.5 Xylenol orange indicator: 2 g/L. 5.1.3 Analysis steps
5.1.3.1 Preparation of test solution
Weigh about 5 g of sample (about 13 g of liquid) to an accuracy of 0.0002 g, place in a 250 mL beaker, add 100 mL of water and 2 mL of hydrochloric acid solution, heat to dissolve and boil for 5 min (filter if necessary), transfer all to a 500 mL volumetric flask after cooling, dilute to scale with water, and shake well. This solution is test solution A for the determination of aluminum oxide and iron content. 5.1.3.2 Preparation of blank test solution
Add 100mL water and 2mL hydrochloric acid solution to a 250mL beaker, heat and boil for 5min, transfer all to a 500mL volumetric flask after cooling, dilute to scale with water, and mix well. 5.1.3.3 Determination
Use a pipette to transfer 15mL of the above test solution A to a 300mL conical flask, add 20mL of ETA solution with a pipette, boil for 1min, add 5mL of sodium acetate solution and 2 drops of xylenol orange indicator solution after cooling, and titrate to light pink with zinc fluoride standard titration solution.
Perform a blank test at the same time.
5.1.4 Expression of analysis results
HG/T2225—2001
The alumina (Al2O3) content (X2X) expressed as mass fraction is calculated according to formula (1): _ 0.050 98 c (V. -V) × 100 - 0.912 8 X2X =
m×500
_169.9 c (V. V) - 0.912 8 X2m
Wherein:
0.912 8-
0.050 98-
Actual concentration of zinc chloride standard titration solution, mol/L; Volume of zinc chloride standard titration solution consumed by titrating blank test solution, mL; Volume of zinc chloride standard titration solution consumed by titrating test solution, mL; Mass of sample, g;
-5.2 Iron (Fe) content measured, %;
Coefficient of converting iron (Fe) into aluminum oxide (AizO:); (1)
The mass of aluminum oxide (A12O) in grams equivalent to 1.00mL zinc chloride standard titration solution [c(ZnCl.)=1.000mol/I.].
5.1.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.15%. 5.2 Determination of iron content
5.2.1 Method summary
Same as Chapter 2 of GB/T3049-1986.
5.2.2 Reagents and materials
Same as Chapter 3 of GB/T3049-1986.
5.2.3 Apparatus and equipment
Spectrophotometer: with an absorption cell of 1 cm thickness. 5.2.4 Drawing of working curve
Draw the working curve according to the provisions of 5.3 of GB/T3049--1986, using a 1 cm absorption cell and the corresponding amount of iron standard solution. 5.2.5 Analysis steps
Use a pipette to transfer 2mL or 5mL of the test solution and 2mL or 5mL of the blank test solution (5.0mL for solid type II and dish type respectively), and place them in 100mL volumetric flasks respectively. The following operations are carried out according to the provisions of 5.4 of GB/T3049-1986, starting from "If necessary, add water to 60ml...". 5.2.6 Expression of analysis results
The iron (Fe) content (X,) expressed as mass fraction is calculated according to formula (2): (m -m2)
m×1000×500
50(m) m2)
The iron content found from the working curve based on the measured absorbance of the test solution, mg; Where: mi-
m2——The iron content found from the working curve based on the measured absorbance of the blank test solution, mg; m
The mass of the sample, g;
V—The volume of the test solution pipetted with a pipette, mL. 5.2.7 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.03% for Type I, 0.001% for Type II, 0.002% for Type III, and 0.02% for liquid. 5.3 Determination of water-insoluble content
5.3.1 Summary of method
HG/T 2225---2001www.bzxz.net
Dissolve the sample in water, filter it with a glass sand crucible, and weigh the residue after drying. 5.3.2 Reagents and materials
BaCl2·2H0 solution: 100g/I. 5.3.3 Instruments and equipment
Glass sand crucible: the pore size of the filter plate is 5μm~15μm. 5.3.4 Analysis steps
Weigh about 20g of sample (accurate to 0.01g), place it in a 250ml. beaker, add 100ml. water, heat to dissolve, filter it while hot with glass sand that has been dried to constant weight at 105℃~~110℃, and wash it with hot water until there is no sulfate ion (check with barium chloride solution). Dry it at 105℃~110℃ to constant weight. 5.3.5 Expression of analysis results
Water-insoluble content expressed as mass fraction (X.) Calculate according to formula (3): X = ma = ml × 100
Where: m
The mass of glass sand,
m2The mass of water-insoluble matter and glass sand crucible, g;The mass of the sample, g.
5.3.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.02%. 5.4 Determination of pH value
5.4.1 Summary of method
· (3)
The sample is dissolved in water, and the pH value of the test solution is measured using an acidometer equipped with a composite electrode or a glass measuring electrode and a saturated calomel reference electrode.
5.4.2 Instruments and equipment
Acidometer: The graduation value is 0.1 pH unit, equipped with a composite electrode or a glass measuring electrode and a saturated calomel reference electrode. 5.4.3 Analysis steps
Weigh (1.00±0.01)g of sample E liquid [(2.60±0.01)g], place in a beaker, add about 50mL of water without carbon dioxide to dissolve, transfer all to a 100mL volumetric flask, dilute to the scale with water without carbon dioxide, and shake well. Measure with an acidometer. 5.4.4 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.2pH units. 6 Inspection rules
6.1 All items specified in this standard are factory inspection items. 6.2 Each batch of products shall not exceed 150t.
6.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. When sampling solid products, first remove the upper layer of the packaging bag about 30cm thick, use the sampling tool to extract no less than 100g of sample from the middle of each bag, quickly crush the sample to less than about 10mm, mix, and reduce it to no less than 500g by quartering; liquid products are sampled according to the provisions of GB/T6680, and more than 500ml of samples are taken from the upper, middle and lower parts of the liquid layer of the storage tank, cabin, and tank car top inlet or from the front, middle and back three sections of the discharge port, and mix well. The samples are divided into two clean, dry wide-mouth bottles with stoppers (solids can be placed in clean and dry plastic bags), sealed, and labels are attached to the bottles, indicating the name of the manufacturer, product name, grade, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference.
6.4 The quality supervision and inspection department of the second industrial aluminum sulfate shall be inspected by the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all industrial aluminum sulfate shipped out of the factory meets the requirements of this standard. 376
HG/T2225—2001
6.5 The user has the right to inspect and accept the industrial aluminum sulfate received in accordance with the provisions of this standard. The inspection and acceptance shall be carried out within two months from the date of arrival.
6.6 If any index of the inspection result does not meet the requirements of this standard, samples shall be taken from the packaging bags of twice the amount for re-inspection. If even one index of the re-inspection result does not meet the requirements of this standard, the whole batch of products shall be unqualified. 6.7 Determine whether the inspection result meets the standard according to the rounded value comparison method specified in GB/T1250. 7 Marking and labeling
7.1 The packaging of industrial aluminum sulfate shall have firm and clear markings, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, this standard number and the "fear" mark specified in GB191. 7.2 Each batch of industrial aluminum sulfate shipped out of the factory should be accompanied by a quality certificate, which includes the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, proof that the product quality complies with this standard and the number of this standard. 8 Packaging, transportation and storage
8.1 Solid industrial aluminum sulfate products are packaged in plastic woven bags lined with polyethylene plastic bags or composite plastic woven bags, with a net content of 50kg per bag. Liquid products are packaged in bulk.
8.2 Industrial aluminum sulfate should be protected from rain and moisture during transportation. 8.3 Industrial aluminum sulfate should be stored in a cool and dry place to prevent rain and moisture. 3773 Instruments and equipment
Glass sand crucible: The pore size of the filter plate is 5μm~15μm. 5.3.4 Analysis steps
Weigh about 20g of sample (accurate to 0.01g), place it in a 250ml beaker, add 100ml of water, heat to dissolve, filter it while hot with glass sand that has been dried to constant weight at 105℃~~110℃, and wash it with hot water until there is no sulfate ion (check with barium chloride solution). Dry it at 105℃~110℃ to constant weight. 5.3.5 Expression of analysis results
The water-insoluble content (X) expressed as mass fraction is calculated according to formula (3): X=ma=ml×100
Where: m
Mass of glass sand;
m2Mass of water-insoluble matter and glass crucible, g; Mass of sample, g.
5.3.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.02%. 5.4 Determination of pH value
5.4.1 Summary of method
·(3))
The sample is dissolved in water, and the pH value of the test solution is measured using an acidometer equipped with a composite electrode or glass measuring electrode and a saturated calomel reference electrode.
5.4.2 Instruments and equipment
Acidometer: The scale value is 0.1 pH unit, equipped with a composite electrode or glass measuring electrode and a saturated calomel reference electrode. 5.4.3 Analysis steps
Weigh (1.00±0.01)g of sample E liquid [(2.60±0.01)g], place in a beaker, add about 50mL of water without carbon dioxide to dissolve, transfer all to a 100mL volumetric flask, dilute to the scale with water without carbon dioxide, and shake well. Measure with an acidometer. 5.4.4 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.2 pH units. 6 Inspection rules
6.1 All items specified in this standard are factory inspection items. 6.2 Each batch of products shall not exceed 150t.
6.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. When sampling solid products, first remove the upper layer of the packaging bag with a thickness of about 30cm, use a sampling tool to extract no less than 100g of sample from the middle of each bag, quickly crush the sample to less than about 10mm, mix, and reduce it to no less than 500g by quartering; liquid products are sampled in accordance with the provisions of GB/T6680, insert the upper, middle and lower parts of the liquid layer from the top inlet of the storage tank, cabin, tank car, or take more than 500ml of sample from the front, middle and back three sections of the discharge port, and mix and evenly mix. The samples are divided into two clean, dry wide-mouth bottles with stoppers (solids can be placed in clean and dry plastic bags), sealed, and labels are attached to the bottles, indicating the manufacturer's name, product name, grade, batch number, sampling date and the name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference.
6.4 The quality supervision and inspection department of the manufacturer shall inspect the industrial aluminum sulfate in accordance with the provisions of this standard. The manufacturer shall ensure that all industrial aluminum sulfate shipped from the factory meets the requirements of this standard. 376
HG/T2225—2001
6.5 The user unit has the right to inspect and accept the industrial aluminum sulfate received in accordance with the provisions of this standard, and the inspection and acceptance shall be carried out within two months from the date of arrival.
6.6 If any index of the inspection result does not meet the requirements of this standard, the sample shall be re-sampled from the packaging bag of twice the amount for re-inspection. If even one index of the re-inspection result does not meet the requirements of this standard, the whole batch of products shall be unqualified. 6.7 Determine whether the test results meet the standard by the rounded value comparison method specified in GB/T1250. 7 Marks and labels
7.1 The packaging of industrial aluminum sulfate should have firm and clear marks, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, this standard number and the "fear" mark specified in GB191. 7.2 Each batch of industrial aluminum sulfate shipped out of the factory should be accompanied by a quality certificate, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, proof that the product quality meets this standard and this standard number. 8 Packaging, transportation and storage
8.1 Solid industrial aluminum sulfate products are packaged in plastic woven bags lined with polyethylene plastic bags or composite plastic woven bags, with a net content of 50kg per bag. Liquid products are packaged in bulk.
8.2 Industrial aluminum sulfate should be protected from rain and moisture during transportation. 8.3 Industrial aluminum sulfate should be stored in a cool and dry place to prevent rain and moisture.3 Instruments and equipment
Glass sand crucible: The pore size of the filter plate is 5μm~15μm. 5.3.4 Analysis steps
Weigh about 20g of sample (accurate to 0.01g), place it in a 250ml beaker, add 100ml of water, heat to dissolve, filter it while hot with glass sand that has been dried to constant weight at 105℃~~110℃, and wash it with hot water until there is no sulfate ion (check with barium chloride solution). Dry it at 105℃~110℃ to constant weight. 5.3.5 Expression of analysis results
The water-insoluble content (X) expressed as mass fraction is calculated according to formula (3): X=ma=ml×100
Where: m
Mass of glass sand;
m2Mass of water-insoluble matter and glass crucible, g; Mass of sample, g.
5.3.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.02%. 5.4 Determination of pH value
5.4.1 Summary of method
·(3))
The sample is dissolved in water, and the pH value of the test solution is measured using an acidometer equipped with a composite electrode or glass measuring electrode and a saturated calomel reference electrode.
5.4.2 Instruments and equipment
Acidometer: The scale value is 0.1 pH unit, equipped with a composite electrode or glass measuring electrode and a saturated calomel reference electrode. 5.4.3 Analysis steps
Weigh (1.00±0.01)g of sample E liquid [(2.60±0.01)g], place in a beaker, add about 50mL of water without carbon dioxide to dissolve, transfer all to a 100mL volumetric flask, dilute to the scale with water without carbon dioxide, and shake well. Measure with an acidometer. 5.4.4 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute value difference of the parallel determination results shall not exceed 0.2 pH units. 6 Inspection rules
6.1 All items specified in this standard are factory inspection items. 6.2 Each batch of products shall not exceed 150t.
6.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. When sampling solid products, first remove the upper layer of the packaging bag with a thickness of about 30cm, use a sampling tool to extract no less than 100g of sample from the middle of each bag, quickly crush the sample to less than about 10mm, mix, and reduce it to no less than 500g by quartering; liquid products are sampled in accordance with the provisions of GB/T6680, insert the upper, middle and lower parts of the liquid layer from the top inlet of the storage tank, cabin, tank car, or take more than 500ml of sample from the front, middle and back sections of the discharge port, and mix evenly. The samples are divided into two clean, dry wide-mouth bottles with stoppers (solids can be placed in clean and dry plastic bags), sealed, and labels are attached to the bottles, indicating the manufacturer's name, product name, grade, batch number, sampling date and the name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference.
6.4 The quality supervision and inspection department of the manufacturer shall inspect the industrial aluminum sulfate in accordance with the provisions of this standard. The manufacturer shall ensure that all industrial aluminum sulfate shipped from the factory meets the requirements of this standard. 376
HG/T2225—2001
6.5 The user unit has the right to inspect and accept the industrial aluminum sulfate received in accordance with the provisions of this standard, and the inspection and acceptance shall be carried out within two months from the date of arrival.
6.6 If any index of the inspection result does not meet the requirements of this standard, the sample shall be re-sampled from the packaging bag of twice the amount for re-inspection. If even one index of the re-inspection result does not meet the requirements of this standard, the entire batch of products shall be unqualified. 6.7 Determine whether the test results meet the standard by the rounded value comparison method specified in GB/T1250. 7 Marks and labels
7.1 The packaging of industrial aluminum sulfate should have firm and clear marks, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, this standard number and the "fear" mark specified in GB191. 7.2 Each batch of industrial aluminum sulfate shipped out of the factory should be accompanied by a quality certificate, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, proof that the product quality meets this standard and this standard number. 8 Packaging, transportation and storage
8.1 Solid industrial aluminum sulfate products are packaged in plastic woven bags lined with polyethylene plastic bags or composite plastic woven bags, with a net content of 50kg per bag. Liquid products are packaged in bulk.
8.2 Industrial aluminum sulfate should be protected from rain and moisture during transportation. 8.3 Industrial aluminum sulfate should be stored in a cool and dry place to prevent rain and moisture.1 Solid products of industrial aluminum sulfate are packaged in plastic woven bags lined with polyethylene plastic bags or composite plastic woven bags, with a net content of 50kg per bag. Liquid products are packaged in bulk.
8.2 Industrial aluminum sulfate should be protected from rain and moisture during transportation. 8.3 Industrial aluminum sulfate should be stored in a cool and dry place, protected from rain and moisture. 3771 Solid products of industrial aluminum sulfate are packaged in plastic woven bags lined with polyethylene plastic bags or composite plastic woven bags, with a net content of 50kg per bag. Liquid products are packaged in bulk.
8.2 Industrial aluminum sulfate should be protected from rain and moisture during transportation. 8.3 Industrial aluminum sulfate should be stored in a cool and dry place, protected from rain and moisture. 377
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